What is this? I get that the band's name is Girls' Generation. Are they performing for North Korean soldiers?

Girls' Generation is incredibly, incredibly popular in most of the Pacific Rim (including, as Xahar says, places like the West Coast and Australia, oddly enough). It's a cultural-ambassadorship thing. Sort of.

So, you suggest that South Korea should secretly fly a few of these barbie-like South Korean pop-star girlies into North Korea and then the South Korean soldiers should play a version of capture-the-flag and invade the North